Method and means for manufacturing drainpipes from veneer



Dec. 23, 1930.

A. HONNINGSTAD. ETAL METHOD AND MEANS FOR MANUFACTURING DRAIN PIPES FROM VENEER Filed March 25. 15550 2 Sheets-Sheet l Dec. 23, 1930.- A. HONNINGSTAD ETAL. 1,786,245

METHOD, AND MEANS FOR MANUFACTURING DRAIN PIPES FRO" VENEER Filed March 25, 1930 ZSheets-Sheet 2 Patented Dec. 23, 1930 UmrEnsrArEs PATENT FFICE AE-IUNID HtlNNINGSTAD AND ARNE ARNESOIN, OF FORUS, NEAR STAVANGER, AND

ALFRED 'noannrra, 01* Britain, NEAR STAVANGER, NORWAY METHOD AND MEANS FOR'MAN'UFACTURING DRAINPIPES FROM VENEER Application'filed March 25, 1930, Serial No. 438,855, andin Norway April 2, 1929.

This invention relates to a method' and means for manufacturing drain pipes from veneer.

For some years experiments have been conducted with such pipes made from veneer and they have been found to be preferable to tile drains in several respects. They are cheap to manufacture, and owing to theirlight weight cheap to transport.

Hitherto these drain pipes have been manufactured by clamping the edges of a sheet of veneer together between wooden laths, which are then nailed or riveted together. This method is, however, not without its drawbacks. the resulting interconnection being not so solid as desirable. Nor have experiments with sewing the veneer sheets together into pipes by aid of wire given any practical results.

The object of this invention is an improved method for the manufacture of such wooden drain pipes from veneer. In this method we likewise make use of two laths between which the longtudinal edges of the veneer sheets are clamped, but the interconnection between the laths and the veneer is brought about by aid of wire loops which are laid across the laths and threaded through the overlapping edges of the veneer to be finally clamped about the laths and fastened by intertwining their ends.

In the following this method will be described with reference to the accompanying drawings, in which Fig. 1 is a side View of a drain pipe manufactured according tothis invention, with parts in section and with its middle portion broken away.' Fig. 2 is a corresponding end view of this pipe.

Fig. 8 is an end view, with parts in section, of means suitable for the carrying out of this method, and Fig. 4 is a corresponding side view. Fig. 5 illustrates partly in section the means for bending the veneer to a cylinder.

For the manufacture ofthe drain pipes there are used sheets 1 of veneer referabl cut from pine or other suitable wood, and in lengths of about 1 meter. These sheets or plates 1 are bent together into a pipe or tube, and their overlapping side edges are clamped between laths or staves 2, 3, one, 2,'lying on the out-side, and the other, 3, lying on the inside of the pipeor tube thus formed. According to this inventon the ends of wire lengths formed into loops 1' are placed'across the lath 2 and driven through the overlapping layers of the veneer and along the sides of the lath 3, to be finallyjoined on the inside of the latter by intertwining as'shown by 5 in Fig. 2.

at suitable intervals and gripped by the semicylindrical parts 7 and 8 (Fig. 5) by aid of which it is folded about the'cylinder '9,'i'nto a slot of which the lath 3 has been shoved in endwi'se beforehand, the slide 10 on the part 7 pressing the veneer edges Relatively to this cylinder 9 a number of plungers 11, arranged at suitable intervals along the length of the-pipe to be formed, are moved up and down by a mechanism not shown, said plungei's being supported in any suitable manner by the frame of the machine. At the lower' ends of these plunger's knives or needles 12 fit into the longitudinal slot 13 on thecylinder 9; To the plungers 11 are also fastened rods 14 carrying pairs of spring bails 15 between which the laths 2 aregripped. The slide 10 is then withdrawn and the plungers 11 are lowered to the position shown in Fig. 3, in which the knives or needles 12 pierce theveneer on both sides of the lathe 2, 8. The wire loops 4 held by the plungers 11 in channels in the'knives or needles 12 are carried through withthe latter, until their ends are inserted'into the gripping member 16 of the twisting device 1?. The latter is provided with a gear wheel 18 in gear with a toothed rack 19, having a l ngthwise movement in the cylinder 9, and-by'aid of which the twisting of the ends of the wire loops at is effectec. Thereupon the plungers 11 are raised leaving the finished pipe on the against the lath cylinder 9, from which it is then shoved off lengthwise when the lath 3 for the next pipe is shoved in lengthwise.

The part 6 may be provided with edges 20 making incisions in the veneer, in order to locate in suitable places the cracks unavoidable in the drying of the pipes, which are preferably made from raw veneer.

The light drain pipes made by this method are especially adapted for use in drain ditches having a loose bottom (as in swamps and the like), for the reason that the ends of the laths 2 and 3 are arranged to project from the ends of the pipe so as to form jaws adapted to grip the ends of the adjoining tubes thereby keeping the pipes in line even if the bottom of the ditch is setting unevenly.

These pipes are also especially adapted for use in connection with dr in plows of the known torpedo type, there being fastened to the end of the torpedo-shaped plow iron a row of drain pipes 'which are for this purpose fastened to each other by clamps.

For this purpose it is of importance that the intertwined ends of the wire loops are located within the pipes so as to be no hindrance for the pipes being hauled into the channel formed by the torpedo shaped plow iron.

The invention is, however, not limited to this arrangement, as the intertwined ends 5 of the wires may also for other purposes be arranged on the outside of the pipes.

Claims.

1. A method of making drain pipes from veneer, consisting in bending a sheet of veneer into a pipe. clamping the longitudinal edges of said sheet together between two lath s, piercing said longitudinal edges on both sides of said laths, inserting through the holes thus pierced loops of wire and clamping the ends of said loops about said laths by intertwining their ends.

2. A method of making drain pipes from veneer, consisting in bending a sheet of veneer into a pipe with. its longitudinal edges overlapping, clamping the overlapping longitudinal edges together between two laths, piercing said longitudinal edges on both sides of said laths, inserting from without through the holes thus pierced loops of wire, and clamping the ends of said loops on the inside about said laths by intertwining their ends.

3. Means for making drain pipes from v eneer, comprising a cylinder. means for folding a sheet of veneer about said cylinder, a longitudinal slot in said cylinder for the endwise insertion of laths, plungers located on both sides of the slot adapted to carry between them another lath, and provided with means for piercing the overlapping edges of the veneer and carrying through it wire loops encircling the said laths, and means for intertwining the ends of said wire loops.

4:. Means for making drain pipes from veneer, comprising a cylinder, means for folding a sheet of veneer about said cylinder, a longitudinal slot in said cylinder for the endwise insertion of laths, plungers located on both sides of the slot adapted to carry between them another lath, and provided with means for piercing the overlapping edges of the veneer and carrying through it wire loops encircling the said laths, and means for intertwining the ends of said wire loops, said intertwining means comprising a toothed gear, a toothed rack in gear therewith, said gear and said rack being both arranged within said cylinder.

In testimony whereof we have signed our names to this specification.

AMUND HONNILNGSTAD. ARNE ARNESON. ALFRED NORHEIM. 

